EP 0207292 A1 19870107 - Method for preparing bischloroformate compositions.
Title (en)
Method for preparing bischloroformate compositions.
Title (de)
Herstellungsverfahren von Bischlorformiatverbindungen.
Title (fr)
Méthode de préparation de composés bischloroformiates.
Publication
Application
Priority
US 74434885 A 19850613
Abstract (en)
Bischloroformate compositions are prepared by passing gaseous phosgene into an agitated aqueous solution of a di-(alkali metal) salt of an organic dihydroxy compound such as bisphenol A, while maintaining said solution at a temperature within the range of about 0-50°C. Phosgene passage and agitation are continued until the bischloroformate composition has precipitated. The reaction is typically complete when the pH of the aqueous phase drops below 7.
IPC 1-7
IPC 8 full level
C07C 68/02 (2006.01); C07C 69/96 (2006.01)
CPC (source: EP US)
C07C 68/02 (2013.01 - EP US); C07C 69/96 (2013.01 - EP US)
Citation (search report)
[X] FR 1432080 A 19660318 - DOW CHEMICAL CO
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
US 4601858 A 19860722; DE 3664764 D1 19890907; EP 0207292 A1 19870107; EP 0207292 B1 19890802; JP S6226251 A 19870204
DOCDB simple family (application)
US 74434885 A 19850613; DE 3664764 T 19860528; EP 86107287 A 19860528; JP 13633186 A 19860613